Add acts_as_lesson_plan_item method
Add acts_as_lesson_plan_item method

cysjonathan/coursemology2,Coursemology/coursemology2,cysjonathan/coursemology2,xzhflying/coursemology2,xzhflying/coursemology2,harryggg/coursemology2,Coursemology/coursemology2,Coursemology/coursemology2,Coursemology/coursemology2,Coursemology/coursemology2,Coursemology/coursemology2,harryggg/coursemology2,Coursemology/coursemology2,harryggg/coursemology2,BenMQ/coursemology2,BenMQ/coursemology2,cysjonathan/coursemology2,BenMQ/coursemology2,xzhflying/coursemology2